Signature of Majorana neutrinos in equal-sign W-production by lepton scattering

2025/09/02 by J.W. van Holten, van Holten, J. W.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum and Classical Electrodynamics

paper · pdf · doi:10.48550/arxiv.2509.02035

openalex publication_date 2025/09/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The question whether standard-model neutrinos are Dirac or Majorana particles is presently undecided. In principle it could be decided in favor of a Majorana signature if same-sign charged lepton scattering would be observed to produce W-boson pairs, which is a lepton-number violating process. The cross section of this scattering process is computed; depending on the initial state the result gives access to different components of the mass matrix. It could also shed light on physics beyond the standard model.

Citations

• Direct neutrino-mass measurement based on 259 days of KATRIN data
• Direct neutrino-mass measurement based on 259 days of KATRIN data
• Complex Spinors and Unified Theories
• Neutrino masses, mixing and oscillations
• Horizontal Symmetry and Masses of Neutrinos

Related

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• Is neutrino produced in standard weak interactions a Dirac or Majorana particle?
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• The phenomenology of neutrinos with Majorana mass terms and standard-model interactions derived in the charge-parity basis
• Not-that-heavy Majorana neutrino signals at the LHC